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I have a 1994 Izuzu Trooper with a 6 cly engine when it starts up it idle's up to 2500 rpm's for about two or three min then slowly kicks down to normal rpm's. then when you put it in gear it idle's back up to 2500 Rpm's . I have replaced the throttle positioning senser, all vacume lines under the hood , and the o2 sensor. Anyone have any advice for me? thanks


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Location: Oregon
what is your coolant temp sensor doing?


   
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As far as I can tell the temp sensor is working properl
It increases as the engine worms up . I haven't
Had any overheating issues


   
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Location: Oregon
the computer temperature sensor tells your computer how cold your engine is. Not the gauge. If your coolant temp sensor is bad it may read too cold so it keeps the high idle on. Just like if your choke was stuck on.


   
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Ok I'll replace the temp sensor and let you know if it fixes my problem thanks for the info


   
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you can just scan for the temperature. If it reads -40F degrees the sensor is open


   
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